Demo of AES GCM Misuse Problems
This is really neat demo of the security problems arising from reusing nonces with a symmetric cipher in GCM mode. [...]
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NIST’s Post-Quantum Cryptography Standards
Quantum computing is a completely new paradigm for computers. A quantum computer uses quantum properties such as superposition, which allows a qubit (a quantum bit) to be neither 0 nor 1, but something much more complicated. In theory, such a computer can solve problems too complex for conventional computers …
SIKE Broken
SIKE is one of the new algorithms that NIST recently added to the post-quantum cryptography competition. It was just broken, really badly. We present an efficient key recovery attack on the Supersingular Isogeny Diffie-Hellman protocol (SIDH), based on a “glue-and-split” theorem due to Kani. Our attack exploits the …
On the Subversion of NIST by the NSA
Nadiya Kostyuk and Susan Landau wrote an interesting paper: “ Dueling Over DUAL_EC_DRBG: The Consequences of Corrupting a Cryptographic Standardization Process “: Abstract: In recent decades, the U.S. National Institute of Standards and Technology (NIST), which develops cryptographic standards for non-national security agencies of the U.S. government, has emerged …
Now that machines can learn, can they unlearn?
Enlarge (credit: Andriy Onufriyenko | Getty Images) Companies of all kinds use machine learning to analyze people’s desires, dislikes, or faces. Some researchers are now asking a different question: How can we make machines forget? A nascent area of computer science dubbed machine unlearning seeks ways to induce selective …
Apple’s NeuralHash Algorithm Has Been Reverse-Engineered
Apple’s NeuralHash algorithm — the one it’s using for client-side scanning on the iPhone — has been reverse-engineered. Turns out it was already in iOS 14.3, and someone noticed : Early tests show that it can tolerate image resizing and compression, but not cropping or rotations. We also have …
Intentional Flaw in GPRS Encryption Algorithm GEA-1
General Packet Radio Service (GPRS) is a mobile data standard that was widely used in the early 2000s. The first encryption algorithm for that standard was GEA-1, a stream cipher built on three linear-feedback shift registers and a non-linear combining function. Although the algorithm has a 64-bit key, the …